I've seen this on TV in mid 00's, but the show might be older.
The plot I remember:
- A boy goes missing into some kind of alternate world
- There are some "garbage men" in white jumpsuits who collect trash and this boy hides from them
- In the real world he is put on milk carton box's "Missing kids" section and he somehow communicates to his parents through this box.
I've been told that this is The Twilight Zone, but I carefully watched 1985 and 2002 revivals and there was not this episode (or I missed an episode) and I doubt that 1950-1960's show would have been on TV in mid 00's.
So, the question is - if that is actually The Twiligt Zone, which revival/season/episode is that? If not, which show might that be?